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All Journal CHEESA: Chemical Engineering Research Articles Scientific Journal of Mechanical Engineering Kinematika
Mochamad Viky Afandy
Universitas Negeri Malang
Automotive Engineering Chemical Engineering, Chemistry & Bioengineering Chemistry Energy Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering

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INTEGRATING AERODYNAMIC OPTIMIZATION AND SIMULATION TO ENHANCE UNMANNED ARIAL VEHICLE PERFORMANCE AND LOWER CARBON EMISSIONS Yahya Zakaria; Mochamad Viky Afandy; Abiyu Ramadhan; Riduwan Prasetya; Yayi Febdia Pradani; Danang Yugo Pratomo; Misbachudin Misbachudin
Scientific Journal of Mechanical Engineering Kinematika Vol 11 No 1 (2026): SJME Kinematika June 2026
Publisher : Mechanical Engineering Department, Faculty of Engineering, Universitas Lambung Mangkurat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20527/sjmekinematika.v11i1.835

Abstract

This study develops an integrated aerodynamic optimization and simulation pipeline for fixed‑wing Unmanned Aerial Vehicle (UAV) to improve mission efficiency while projecting lower carbon emissions through energy use reductions. A parametric geometry with airfoil selection, aspect ratio, sweep, taper, twist, and winglet controls is optimized using a multi‑objective genetic algorithm coupled to Computational Fluid Dynamics (CFD) simulation. Objectives minimize drag and mission power while maximizing lift‑to‑drag under representative cruise conditions. A data‑efficient power model links aerodynamic states to per‑mission energy, enabling rapid iteration as a surrogate within the optimization loop. To ensure reliability, the CFD solver was validated against NASA experimental benchmarks for the NACA 0012 airfoil, achieving a margin of error below 3%. The optimization results demonstrate a significant shift from traditional baseline designs. By adopting a non-symmetric air foil combination, NACA 4412 root and NACA 2412 tip, increasing the aspect ratio to 9.8, and implementing specific winglet cant angels, the optimized design achieved a 44.7% reduction in aerodynamic drag. Visual analysis through velocity and pressure contours confirmed cleaner flow fields and weakened wingtip vortices, which directly translate to lower propulsion power. Ultimately, this study delivers a reproducible design pipeline an a Pareto-optimal map for balancing aerodynamic efficiency with structural practicality. While emissions were not measured directly, the documented 44.7% reduction in drag and corresponding decrease in energy demand provide a strong indicator for the potential to lower the carbon footprint of future UAV operations.
Potato Peel Starch Bioplastics Reinforced with Microcrystalline Cellulose, PVA, and Chitosan: Mechanical, Thermal, and Antibacterial Properties Mochamad Viky Afandy; Andoko; Riduwan Prasetya; Muhammad Faizullah Pasha; Mohammad Sukri bin Mustapa
CHEESA: Chemical Engineering Research Articles Vol. 9 No. 1 (2026): In Progress
Publisher : Universitas PGRI Madiun

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25273/cheesa.v9i1.24438.26-40

Abstract

The increasing accumulation of petroleum-based plastic waste has led to the development of biodegradable packaging materials from renewable agro-industrial resources. Therefore, this study aims to synthesize biodegradable potato peel starch/polyvinyl alcohol (PPS/PVA) blend bioplastic films reinforced with microcrystalline cellulose (MCC) and functionalized with chitosan. Films were prepared through solution casting with varied MCC contents and characterized for density, tensile properties, crystallinity, thermal stability, morphology, antibacterial activity, and biodegradability. The results showed that an increase in MCC improved film compactness, tensile strength, crystallinity, and surface uniformity, showing stronger interfacial interactions within the polymer matrix. FTIR confirmed enhanced hydrogen bonding among starch, PVA, chitosan, and MCC, while thermal analysis showed improved resistance to degradation. The produced films also exhibited antibacterial activity against Staphylococcus aureus and Escherichia coli, with the highest performance observed at higher MCC loading. Despite reinforcement, the products remained biodegradable in soil. These results show the potential of PPS/PVA blend bioplastic films containing PPS waste as sustainable materials for active packaging applications.
Co-Authors Abiyu Ramadhan Andoko Danang Yugo Pratomo Misbachudin Misbachudin Mohammad Sukri Bin Mustapa Muhammad Faizullah Pasha Riduwan Prasetya Yahya Zakaria Yayi Febdia Pradani